package com.ct.commons.handler;

import com.ct.utils.result.R;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.core.MethodParameter;
import org.springframework.http.MediaType;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.server.ServerHttpRequest;
import org.springframework.http.server.ServerHttpResponse;
import org.springframework.web.bind.annotation.RestControllerAdvice;
import org.springframework.web.servlet.mvc.method.annotation.ResponseBodyAdvice;

@RestControllerAdvice
public class ResultResponseHandler implements ResponseBodyAdvice<Object> {

    @Override
    public boolean supports(MethodParameter returnType, Class<? extends HttpMessageConverter<?>> converterType) {
        return true;
    }

    @Override
    public Object beforeBodyWrite(Object body, MethodParameter returnType, MediaType selectedContentType, Class<? extends HttpMessageConverter<?>> selectedConverterType, ServerHttpRequest request, ServerHttpResponse response) {
        if (body instanceof  ErrorHandler){
            ErrorHandler errorHandler = (ErrorHandler) body;
            return R.fail(errorHandler.getCode(),errorHandler.getName(),errorHandler.getMsg());
        }else if(body instanceof  String){
            try {
                return new ObjectMapper().writeValueAsString(R.success(body));
            }catch (Exception ex){
                ex.printStackTrace();
            }
        }else if (body instanceof  R<?> || body instanceof  R){
            return body;
        }
        return R.success(body);
    }
}
